ios - 将 deviceToken 从 AppDelegate 传递到 swift 中的另一个类时出错

Question

我在 AppDelegate 中创建此变量来存储 deviceToken，然后将其传递给另一个类

var deviceTokenToPass:NSData?

func application(application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: NSData) {


     deviceTokenToPass = deviceToken


}

在另一个类中，我尝试将 deviceToken 传递给 Parse.com，但在传递 deviceToken 值的行中出现异常

let delegate = UIApplication.sharedApplication().delegate as! AppDelegate

let deviceToken = delegate.deviceTokenToPass




var currentInstallation = PFInstallation.currentInstallation()

currentInstallation.setDeviceTokenFromData(deviceToken)  // Exception in this line
currentInstallation.channels = ["global"]

currentInstallation.saveInBackground()

当我将其放入 AppDelegate 中时，它工作正常，但我想将此数据存储在另一个类中

Answer 1

你需要打开它

if let deviceToken = delegate.deviceTokenToPass
{
    var currentInstallation = PFInstallation.currentInstallation()

    currentInstallation.setDeviceTokenFromData(deviceToken)
    currentInstallation.channels = ["global"]

    currentInstallation.saveInBackground()
}